But there’s been nothing seen or heard since then – but information might now be starting to leak out.

Los Angeles outfit Terrorizer say that they bumped into Johnson at an airport recently when they returned home from their European tour – and, asked if the rumours were true, Johnson replied, “Yes” and said he was “sick of denying it.”

Terrorizer say: “We ran into Brian Johnson from AC/DC at the airport today after the flight home and we asked him about the rumours of him being on the new AC/DC album.

"He said, 'Yes' and that he is 'sick of denying it'. So that was a cool surprise ending to the tour.”

Johnson was forced to stop touring with AC/DC in 2016 under the threat of permanent deafness, with the band famously bringing in Guns N’ Roses frontman Axl Rose to complete their Rock Or Bust world tour.